一、铝板挤压产生气泡、起皮的原因
1. The reasons for the extrusion of aluminum plates to produce bubbles and peels
挤压筒、挤压垫磨损超差，挤压筒和挤压垫尺寸配合不当，使用的垫片直径差超过允许值；
The diameter of the gasket is higher than the allowable value because of the improper wear and tear of the extrusion cylinder, the extrusion pad and the improper size of the extrusion cylinder and the extrusion pad.
挤压筒和挤压垫太脏，粘有油污、水分、石墨等；
The extrusion cylinder and the extrusion pad are dirty, sticky with oil, moisture, graphite, etc.
润滑油中含有水；
The lubricating oil contains water.
铸锭表面铲槽太多，过深，或铸锭表面有气孔、砂眼，组织疏松、有油污等；
The surface of the ingot is too much, too deep, or the surface of the ingot has holes and sand holes, which are loose and oily.
更换合金时，筒内未清理干净；
When the alloy is replaced, the inside of the cylinder is not cleaned.
挤压筒温度和挤压铸锭温度过高；
The temperature of the extruding tube and the temperature of the extruded ingot are too high.
铸锭温度、尺寸超过允许负偏差；
The ingot temperature and size exceed the allowable negative deviation.
铸锭过长，填充太快，铸锭温度不均，引起非鼓形填充，因而筒内排气不完全，或操作不当，未执行排气工序；
The ingots are too long, the filling is too fast, and the temperature of the ingot is uneven, resulting in non drum shaped filling, so the exhaust is incomplete or improper in the cylinder, and the exhaust process is not carried out.
模孔设计不合理，或切残料不当，分流孔和导流孔中的残料被部分带出，挤压时空隙中的气体进入表面。
The design of the mold hole is unreasonable, or the cutting residual material is not proper. The residual material in the diverting hole and the diversion hole is partly taken out, and the gas in the space time gap is extruded into the surface.

二、铝板挤压产生气泡、起皮的消除方法
Two. Methods to eliminate bubbles and skins from aluminum extrusion.
合理设计挤压筒和挤压垫片的配合尺寸，经常检查工具尺寸，保证符合要求，挤压筒出现大肚要及时修理，挤压垫不能超差；
Reasonable design of the matching dimensions of the extruding and extruding gaskets, often check the size of the tool, guarantee the requirements, the extrusion cylinder should be repaired in time, and the extruding pad can not be overtaken.
工具、铸锭表面保持清洁、光滑和干燥；
The surface of tools and ingots should be clean, smooth and dry.
更换合金时，彻底清筒；
When replacing the alloy, clean the tube thoroughly.
经常检查设备和仪器，防止温度过高、速度过快；
Check equipment and instruments regularly to prevent high temperature and speed.
严格执行工艺规程和各项制度；
Strictly implement the process regulations and various systems.
合理设计、制造工模具，导流孔和分流孔设计成1°-3°内斜度；
Reasonable design and manufacture of tooling, diversion holes and diversion holes are designed to be 1 degrees -3 degrees.
严格操作，正确剪切残料和完全排气。
Strict operation, correct cutting of debris and complete exhaust.